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STATE OF OKLAHOMA
Legal Provisions Regarding Redistricting
Oklahoma Constitution
Article 5 - Legislative Department
The Senate
Article 5 Section 9A - Senatorial districts - Tenure
§ 9A. Senatorial Districts - Tenure.
The state shall be apportioned into forty-eight senatorial districts in the following manner: the nineteen most
populous counties, as determined by the most recent Federal Decennial Census, shall constitute nineteen
senatorial districts with one senator to be nominated and elected from each district; the fifty-eight less populous
counties shall be joined into twenty-nine two-county districts with one senator to be nominated and elected from
each of the two-county districts. In apportioning the State Senate, consideration shall be given to population,
compactness, area, political units, historical precedents, economic and political interests, contiguous territory,
and other major factors, to the extent feasible.
Each senatorial district, whether single county or multi-county, shall be entitled to one senator, who shall hold
office for four years; provided that any senator, serving at the time of the adoption of this amendment, shall
serve the full time for which he was elected. Vitalization of senatorial districts shall provide for one-half of the
senators to be elected at each general election.
Historical Data Added by State Question No. 416, Ref. Petition No. 142, adopted at election held May 26, 1964.
The House of Representatives
Article 5 Section 10A - House of Representatives - Number of members - Formula - Tenure
§ 10A. House of Representatives - Number of members - Formula - Tenure.
The House of Representatives shall consist of the number of Representatives as determined by the formula and
procedure set forth herein. The number of members of the House of Representatives to which each county shall
be entitled shall be determined according to the following formula:
a. The total population of the state as ascertained by the most recent Federal Decennial Census shall be divided
by the number one hundred and the quotient shall be the ratio of representation in the House of
Representatives, except as otherwise provided in this Article.
b. Every county having a population less than one full ratio shall be assigned one Representative; every county
containing an entire ratio but less than two ratios shall be assigned two Representatives; every county
containing a population of two entire ratios but less than three ratios shall be assigned three Representatives;
and every county containing a population of three entire ratios but less than four ratios shall be assigned four
Representatives.
After the first four Representatives, a county shall qualify for additional representation on the basis of two whole
ratios of population for each additional Representative.
Each Representative nominated and elected shall hold office for two years.
Historical Data Added by State Question No. 416, Ref. Petition No. 142, adopted at election held May 26, 1964.

STATE OF OKLAHOMA
Legal Provisions Regarding Redistricting
Oklahoma Constitution
Article 5 - Legislative Department
The Senate
Article 5 Section 9A - Senatorial districts - Tenure
§ 9A. Senatorial Districts - Tenure.
The state shall be apportioned into forty-eight senatorial districts in the following manner: the nineteen most
populous counties, as determined by the most recent Federal Decennial Census, shall constitute nineteen
senatorial districts with one senator to be nominated and elected from each district; the fifty-eight less populous
counties shall be joined into twenty-nine two-county districts with one senator to be nominated and elected from
each of the two-county districts. In apportioning the State Senate, consideration shall be given to population,
compactness, area, political units, historical precedents, economic and political interests, contiguous territory,
and other major factors, to the extent feasible.
Each senatorial district, whether single county or multi-county, shall be entitled to one senator, who shall hold
office for four years; provided that any senator, serving at the time of the adoption of this amendment, shall
serve the full time for which he was elected. Vitalization of senatorial districts shall provide for one-half of the
senators to be elected at each general election.
Historical Data Added by State Question No. 416, Ref. Petition No. 142, adopted at election held May 26, 1964.
The House of Representatives
Article 5 Section 10A - House of Representatives - Number of members - Formula - Tenure
§ 10A. House of Representatives - Number of members - Formula - Tenure.
The House of Representatives shall consist of the number of Representatives as determined by the formula and
procedure set forth herein. The number of members of the House of Representatives to which each county shall
be entitled shall be determined according to the following formula:
a. The total population of the state as ascertained by the most recent Federal Decennial Census shall be divided
by the number one hundred and the quotient shall be the ratio of representation in the House of
Representatives, except as otherwise provided in this Article.
b. Every county having a population less than one full ratio shall be assigned one Representative; every county
containing an entire ratio but less than two ratios shall be assigned two Representatives; every county
containing a population of two entire ratios but less than three ratios shall be assigned three Representatives;
and every county containing a population of three entire ratios but less than four ratios shall be assigned four
Representatives.
After the first four Representatives, a county shall qualify for additional representation on the basis of two whole
ratios of population for each additional Representative.
Each Representative nominated and elected shall hold office for two years.
Historical Data Added by State Question No. 416, Ref. Petition No. 142, adopted at election held May 26, 1964.